Camtasia is software that lets your record your screen as well as letting you capture your camera, microphone, system audio and mouse cursor movements. You can also edit your video and audio within the program, including adding transitions, callouts and text. You can highlight your cursor, resize it and edit its movement to make it smoother and clearer for your learners.
You can use Camtastia to create your own screen recordings and walkthroughs to use in your educational content.
You can learn more about how to use Camtasia at their official tutorial collection page.